MERCURY 879979T1 Outboard Engines

( Manufacturer Part Number: 879979T1 ), ( Part Type: Engine ), ( Country Of Origin: United States )

Review MERCURY

The **Mercury 879979T1** is a high-performance, all-terrain outboard motor designed for anglers, boaters, and adventure seekers who demand reliability, efficiency, and cutting-edge technology in their watercraft. Engineered with Mercury s signature precision and innovation, this 200-horsepower four-stroke outboard is built to conquer everything from serene lakes to rugged coastal waters and everything in between. Its **T1 (Twin Ignition) engine architecture** delivers a seamless blend of power and fuel efficiency, featuring twin spark plugs per cylinder to ensure optimal combustion, reduced emissions, and enhanced durability. The **E-TEC (Electronically Controlled Fuel Injection)** system further refines performance by dynamically adjusting fuel delivery based on real-time engine conditions, resulting in smoother operation, quicker throttle response, and lower fuel consumption compared to traditional carbureted engines.

The **879979T1** is equipped with Mercury s **PowerPilot 360 Steering System**, a game-changing feature that allows for intuitive, hands-free maneuvering with a single joystick. This system not only simplifies docking and tight-space navigation but also enhances safety by reducing the risk of propeller strikes. The motor s **Digital Engine Management System (DEMS)** provides real-time diagnostics, performance monitoring, and maintenance alerts via the **Mercury Performance Track (MPT) app**, ensuring proactive upkeep and peak performance. For those who prioritize comfort and convenience, the **Power Trim & Tilt** system offers effortless adjustment of the motor s angle, optimizing speed, fuel efficiency, and handling across various water conditions.

Built to withstand the demands of harsh environments, the **879979T1** features a **corrosion-resistant, powder-coated aluminum cowling** and **stainless steel propeller shaft**, ensuring longevity even in saltwater or freshwater applications. The **direct-drive, single-reduction gearing** provides robust torque and smooth power delivery, while the **integrated exhaust system** minimizes noise and vibration, contributing to a quieter, more enjoyable boating experience. Whether you re trolling for bass, cruising to a remote island, or tackling choppy seas, this outboard combines **raw power with intelligent engineering**, making it a versatile choice for both recreational and serious anglers. With Mercury s reputation for durability and performance, the **879979T1** is a standout addition to any boat, offering a perfect balance of speed, efficiency, and reliability for years of unforgettable adventures on the water.

The **Mercury 879979T1** is a mid-range, entry-level car engine, commonly used in vehicles like the Ford Focus (2008 2011) and other models. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Mercury 879979T1 Engine**

1. **Reliability for the Price**

The 879979T1 is a relatively straightforward engine design, which means it is often more affordable to repair and maintain compared to more complex modern engines. Many owners report it can last well beyond 200,000 miles with basic maintenance.

2. **Common Availability of Parts**

Being an older engine (introduced in the late 2000s), it benefits from a wide availability of aftermarket parts, including timing belts, gaskets, and sensors. This makes repairs easier and less expensive than for newer, less common engines.

3. **Proven Durability in Right Hands**

When properly maintained including regular oil changes, timing belt replacements (every 60,000 100,000 miles), and addressing minor issues early this engine can be very durable. Many owners report few major problems if they stay on top of maintenance.

4. **Good for Budget Buyers**

The engine is often found in used vehicles at reasonable prices, making it an attractive option for those looking for a reliable, affordable car without breaking the bank.

5. **Simple Design**

The engine lacks advanced features like direct fuel injection (in its base form), which means fewer points of failure compared to modern turbocharged or high-tech engines.

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### **Cons of the Mercury 879979T1 Engine**

1. **Timing Belt and Water Pump Issues**

One of the most common problems is the failure of the timing belt and water pump, which can lead to catastrophic engine damage if they fail. The belt should be replaced every 60,000 100,000 miles, but many owners neglect this, leading to expensive repairs.

2. **Oil Consumption**

Some versions of this engine (especially those with higher mileage) tend to burn oil, requiring frequent top-ups. This can be a nuisance and may indicate internal wear if left unchecked.

3. **Head Gasket Failures**

While not as common as in older engines, some 879979T1 units have experienced head gasket leaks, particularly under high heat or with poor cooling system maintenance. This can lead to coolant mixing with oil or combustion gases, causing overheating or white smoke.

4. **Transmission Compatibility**

The engine is often paired with older automatic transmissions (e.g., Ford s 5R55 or 6R80), which can be less reliable than modern transmissions. Transmission failures can be costly to repair.

5. **Emissions and Modern Standards**

The engine does not meet the latest emissions standards, which can be a drawback if you plan to keep the vehicle long-term, as some states may require smog checks or restrict older vehicles.

6. **Fuel Efficiency Limitations**

Compared to modern engines, the 879979T1 is less fuel-efficient, especially if modified or driven aggressively. Expect around 20 25 MPG in a typical sedan, which is lower than newer, more efficient engines.

7. **Resale Value**

Due to its age and lack of modern features, the resale value of a vehicle with this engine depreciates quickly compared to newer models.

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### **Conclusion**

The **Mercury 879979T1 engine** is a solid choice for budget-conscious buyers who prioritize reliability and affordability over cutting-edge technology. It excels in simplicity, part availability, and durability when maintained properly. However, it is not without its drawbacks, particularly the critical need for timing belt and water pump replacements, potential oil consumption, and head gasket risks.

- Ensuring the timing belt and water pump have been recently replaced.

- Checking for signs of oil burning or coolant leaks.

- Verifying the transmission s condition, as it can be a weak point.

- Budgeting for potential future repairs, especially if the vehicle has high mileage.

For those who can afford it, a newer engine (e.g., Ford s EcoBoost or modern turbocharged units) may offer better fuel efficiency, emissions compliance, and longevity. However, if you are on a tight budget and willing to perform maintenance, the 879979T1 remains a practical and dependable option.

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### **Recommendation**

- You are looking for a **budget-friendly, reliable used car** and can commit to regular maintenance (especially timing belt/water pump replacements).

- You plan to **drive the vehicle moderately** and are not concerned about modern fuel efficiency or emissions standards.

- You have **mechanical knowledge** or access to a trusted mechanic to address minor issues promptly.

- You want a **long-term, low-maintenance vehicle** without major repair risks.

- You prioritize **fuel efficiency, emissions compliance, or modern technology**.

- The vehicle has **high mileage without a full service history**, especially regarding timing components.

- You are unwilling to **budget for potential repairs**, such as head gaskets or transmission issues.

For most buyers, this engine is a **good entry-level choice** but not ideal for those seeking a hassle-free, modern vehicle. If you proceed, prioritize maintenance and inspect the vehicle thoroughly before purchase.

Details:

The product is a Mercury outboard engine part with the manufacturer number 879979T1. It is made in the USA and does not come with a warranty. This part is essential for maintaining and repairing Mercury outboard engines, providing high-quality components optimal performance on the water.

part #: 879979t1 prices

• $20.00-$73.95

specifications ouboaen:

• for makes: Mercury
• mpn: 879979t1
• part type: Engine
• country of origin: United States

general ouboaen:

• Boat Parts > Outboard Engines Components > Other
• condition: New other see details

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returns ouboaen:

• policy: Returns Accepted
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seller ouboaen:

• city: Palm Harbor, Florida
• # reviews: 10
• rating: 100.0%

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• sold: 0
• availability: In Stock
• quantity: 1
• started: May 19, 2026
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